The requirements of Section 3109 do not apply to the modification, maintenance or repair of existing habitable structures, provided all of the following apply to the modification, maintenance, or repair:
- Is within the limits of the existing foundation.
- Does not require, involve or include any additions to, or repair or modification of, the existing foundation.
- Does not include any additions or enclosures added, constructed, or installed below the lowest floor or deck.
Advisory Note. If the modification or repair is determined to be substantial improvement or substantial damage, and if the building is located in a special flood hazard area (Zone A and Zone V) established in Section 1612.3, the requirements of Florida Building Code, Existing Building applicable to flood hazard areas shall apply.